Edge Online reports that the Cooking Mama publisher has posted $20.3 million in US revenues for the second quarter of its financial year, ended April 30.

According to the report, sales were up 79 percent ($8.9m) year over year. Much of the success is thanks to the Cooking Mama franchise. As of last month, the series surpassed four million sales in the States. Earnings are also attributed to Jillian Michaels Fitness Ultimatum 2009’s strong performance at retail.